Blastocyst transfer in frozen-thawed cycles / 대한생식의학회지
Clinical and Experimental Reproductive Medicine
;
: 114-117, 2012.
Article
in English
| WPRIM
| ID: wpr-52811
ABSTRACT
OBJECTIVE:
It is well known that fresh blastocyst transfer results in better pregnancy outcomes with a smaller number of transferred embryos compared with cleavage stage embryo transfer. However, in terms of frozen-thawed blastocyst transfer, only a few studies are available. We aimed to evaluate clinical outcomes of frozen-thawed embryo transfer (FET) with blastocysts.METHODS:
Retrospective analysis of FET cycles with blastocysts (B-FET) between Jan 2007 and June 2009 was performed. Age-matched FET cycles with cleavage stage embryos (C-FET) during the same period were collected as controls. A total of 58 B-FET cycles were compared with 172 C-FET cycles and also compared with those of post-thaw extended culture blastocysts from frozen pronuclear stage embryos (22 cycles).RESULTS:
There was no difference in the patient characteristics of each group. The embryos' survival rates after thawing were comparable (>90%) and there was no difference in the implantation rate or clinical and ongoing pregnancy rate among the three groups.CONCLUSION:
In FET, blastocyst transfers may not present better pregnancy outcomes than cleavage stage embryo transfers. A further large-scale prospective study is needed.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Blastocyst
/
Pregnancy Outcome
/
Survival Rate
/
Retrospective Studies
/
Pregnancy Rate
/
Embryo Transfer
/
Embryonic Structures
Type of study:
Observational study
Limits:
Female
/
Humans
/
Pregnancy
Language:
English
Journal:
Clinical and Experimental Reproductive Medicine
Year:
2012
Type:
Article
Similar
MEDLINE
...
LILACS
LIS